I am in need of a formula. (visible wavelength, thin film)

AI Thread Summary
The discussion revolves around the formula for thin film interference, specifically 2nt = (m[+.5])λ. The user seeks clarification on what value to use for m to achieve the minimum index, questioning whether to use m=1 and whether to include the [+.5] for destructive or constructive interference. It is noted that m should be the smallest integer that keeps the right-hand side of the equation positive. The conversation emphasizes understanding the conditions for constructive versus destructive interference in thin films. Overall, the focus is on applying the correct values in the formula for accurate results.
bobbo7410
Messages
36
Reaction score
0
---------

If anyone could help me out it would be greatly appreciated.

2nt = (m[+.5])\lambda
 
Last edited:
Physics news on Phys.org
What's the problem? You seem to have the right equation on hand.
 
o yea sorry, the further question was;

what would I use for m to achieve the minimum index? 1?

As well, would I use the [+.5] or not, meaning destructive vs constructive.

Those 2 were my detailed questions.
 
anyone?
 
M would have to be the smallest possible integer without the right-hand-side being less than or equal to 0.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Question about whether the intensity of visible wavelengths is intensified
Replies
3
Views
1K
Effect on visibility of thin films due to interference
Replies
35
Views
3K
Thin-Film Interference (2 Wavelengths)
Replies
14
Views
3K
Thin film constructive interference
Replies
3
Views
4K
How Does Thin Film Interference Affect Light Reflection?
Replies
1
Views
2K
Formula for maximum interference for reflected light (thin - film)
Replies
3
Views
2K
Finding the Minimum Thickness for Destructive Interference in Thin Films
Replies
7
Views
6K
What Visible Wavelengths Cause Maximum Constructive Interference in a Thin Film?
Replies
1
Views
3K
What is the Index of Refraction of the Liquid in Thin Film Interference?
Replies
4
Views
3K
Wavelength in the visible spectrum most strongly transmitted
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top